Cultus AC performance

Is there any way to improve cultus ac performnce in summer. I used to travel to interior sindh(mostly larkana) in summers i had notice that when ambient temperature outside is 45 or 46 then only front passengers get appropriate cooling and siting back complaining of cooling and my car is 2014 cultus everything is ok cooling fans runs fine original used and refrigerant is leved evaporator is not chocked and throw is quite enough but cooling is not good jesi karachi me hoti he please don't day that compressor weak its new car bhai. Anyone know any alterations to do and get improve performance if any one is suggesting some thing kindly also quote price for that job.

If the air throw is good then service won't affect much on cooling..
Actually there is another problem in cultus that is its insulation is not proper..
Dashboard gets heated and the cooling decreases try to keep the dashboard cool.

whom should i visit for insulation
how long is the job and what would be charges?

I did that from a AC Technician some 4 year's ago.. I simply gave him the keys and left my car at his work shop we used to do all the AC work from him so left the car with him...
He insulated the whole interior roof, floor, boot, firewall, door's.... He got that sheet from some scrap yard the sheet was like one layer of foil paper one layer of foam one layer of some rubberised material. And used that all over the car after that day the car remains noticeably cool.. At that time all costed us some 7000-/RS including his labour and the cost of that sheet and the time he took almost 9 hours to finish the job..
After that i didn't visited his shop for some 2 year's. 2 years back i again wanted to insulate another car from him when i went there i came to know that he has shifted to some other city...
Then i met another mechanic he recommended to use diamond jumbolon but the results of jumbolon aren't that good just felt a 10% difference...

i have cultus 15 and in last summer i was coming back home from shogran at day time. I noticed that AC was not working upto the mark and when i touched the dashboard it was quite hot. so i put the window shade on dashboard and after around 10-15 minutes i was getting quite chill air.
Try using some towel or anything else which can reduce the effect of heat on dashboard you will definitely feel the difference.

If the air throw is good then service won't affect much on cooling..
Actually there is another problem in cultus that is its insulation is not proper..
Dashboard gets heated and the cooling decreases try to keep the dashboard cool.